MESON Chess Problem Database

Problem Display
PID: 42042 (8/4P3/KP1p4/p2k1N2/p2b1p2/P4p1B/P1N2BQ1/2RR4 w - - 0 1)

van Dijk, Nils Gustav Gerard

2nd Prize, Segal MT, 1961

8/4P3/KP1p4/p2k1N2/p2b1p2/P4p1B/P1N2BQ1/2RR4

#2

12 + 7

3749 FIDE Album (1959-1961) 1966
102 Probleemblad 1979
133 The Problemist Supplement 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sce3#
    • 1...Kc5
      • 2.Sb4#
  • Tries
    • 1.Qg7?
      • 1...Kc4
        • 2.Sce3#
        • 2.Qxd4#
      • 1...Ke4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Kc5
        • 2.Sb4#
      • 1...Ke6
        • 2.Sfe3#
      • 1...Kc6!
    • 1.e8Q?
      • 1...Kc4
        • 2.Sce3#
      • 1...Kc5
        • 2.Sb4#
        • 2.Qb5#
      • 1...fxg2!
  • Keys
    • 1.Qg5!
      • 1...Kc4
        • 2.Sce3#
      • 1...Ke4
        • 2.Sxd6#
      • 1...Kc5
        • 2.Sb4#
      • 1...Ke5
        • 2.Sg3#
      • 1...Kc6
        • 2.Sfxd4#
      • 1...Ke6
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINB(c),N_SPINP(a),S_FLIGHT::R(A)+S(D),DCHECK
    • K(f);N_SPINP(a),P-FLIGHT::R(A)+S(D)
  • Tries
    • Try
      • Q(F);N_PINP(a)
      • Vars
        • K(f);P-FLIGHT::R(A)+S(D)
        • K(f);N_SPINB(c),S_FLIGHT::B(H)+S(I)
      • Refutation
        • K(f);N_SPINB(c),S_FLIGHT
    • Try
      • P(L);
      • Vars
        • K(f);N_SPINB(c),N_SPINP(a),S_FLIGHT::R(A)+S(D),DCHECK
      • Refutation
        • P(a);N_SPINP(a),XQ(F)
  • Actual
    • Q(F);N_PINP(a)
    • Vars
      • K(f);N_SPINB(c),S_FLIGHT::R(A)+S(D),DCHECK
      • K(f);N_SPINB(c),S_FLIGHT::S(I),XP(g)
      • K(f);P-FLIGHT::R(A)+S(D)
      • K(f);N_SPINB(c),P-FLIGHT::QAR(F)+S(I)
      • K(f);N_SPINB(c),S_FLIGHT::S(I),XB(c)
      • K(f);N_SPINB(c),S_FLIGHT::B(H)+S(I)
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